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Table 1 Allocation of observed combinations of Harvester and ELISA operator.

From: Quality assessment of an interferon-gamma release assay for tuberculosis infection in a resource-limited setting

Sample

Specimen*

Harvest

ELISA

Data

Sample

Specimen

Harvest

ELISA

Data

1

1

A

A

Observed

7

4

A

A

Observed

2

1

A

B

Observed

 

4

A

B

Not observed

 

1

B

A

Not observed

8

4

B

A

Observed

 

1

B

B

Not observed

 

4

B

B

Not observed

 

2

A

A

Not observed

 

5

A

A

Not observed

 

2

A

B

Not observed

9

5

A

B

Observed

3

2

B

A

Observed

 

5

B

A

Not observed

4

2

B

B

Observed

10

5

B

B

Observed

5

3

A

A

Observed

 

6

A

A

Not observed

 

3

A

B

Not observed

11

6

A

B

Observed

 

3

B

A

Not observed

12

6

B

A

Observed

6

3

B

B

Observed

 

6

B

B

Not observed

  1. *To each specimen, two measurements were assigned. This layout was repeated twice by using different sets of specimens in each trial.